Splash About Size Adjustable Swim Nappy

Splash About Size Adjustable Swim Nappy is a reusable polyester under nappy with adjustable poppers to adapt the fit as a baby grows. It can be worn alone or under a Happy Nappy, where the manufacturer describes it as part of a double-layer system.

At a glance

Poppers adjust at the waist and leg length, with settings intended to accommodate growth.
Designed as an under nappy for the Splash About Happy Nappy double-layer system, but may also be worn on its own.
Reusable construction offers an alternative to disposable swim nappies.

Price

£5.95Save 15%

Reference price: ~~£7.00~~

Price checked: 13 Nov 2026

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Often bought together

Splash About Happy Nappy Sunsuit, Swimwear for Babies and Toddlers with Built-in Nappy

£16.80

Slash About Happy Nappy Costume, One Piece Swimwear for Babies and Toddlers

£18.99

Pros and cons

Pros

Adjustable poppers allow the fit to be changed as the child grows.
Machine washable and reusable, so it can be used across multiple swims.
Can serve as an additional layer under a Happy Nappy or as a standalone swim nappy.

Technical specifications

5 specifications

Design and fit
Material	super soft polyester
Adjustment	multiple poppers
Stated fit period	up to 1 year
Wear options	can be worn on its own or under a Happy Nappy

Care
Care	Machine Washable

What to know before buying

The manufacturer describes the intended fit period as both over a year and up to 1 year. Check current fit against your child, especially as customer feedback includes both good-fit and snug-fit reports. The manufacturer describes this under nappy as one layer of a double-layer system, so it should not be treated as equivalent to the complete system when that is required.

Who is it for?

A good fit for

Parents seeking a reusable swim nappy with adjustable poppers as their baby grows.
Buyers assembling the Splash About double-layer system with a separate Happy Nappy.

Less suited to

Buyers who need a complete double-layer swim-nappy system in one purchase. The Happy Nappy and liners are described separately.

Splash About Size Adjustable Swim Nappy · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 320 ratings

5 stars75%75%
4 stars14%14%
3 stars5%5%
2 stars4%4%
1 star2%2%

Customer feedback highlights adjustability and ease of use, with reports that the nappy serves its purpose. Fit and comfort are mixed: some find the fit good while others say it is snug, and one customer reports marks after swimming. Many report no accidents, but this feedback is not a guarantee of containment. The adjustable poppers provide fitting options, though a careful fit check matters, particularly if using it beneath a separate Happy Nappy. Aggregate ratings are mostly five-star, but do not explain the differing fit and comfort experiences.

Positive themes

Customers appreciate its adjustability and ease of use.
Customers report that it serves its purpose well.

Negative themes

One customer reports marks left on their child after swimming.

Mixed feedback

Fit and comfort receive mixed feedback, including reports of a good fit and a fit that feels too snug.
Many customers report no accidents during use, but this is not a guarantee of leak protection.

Frequently asked questions

Can this swim nappy be worn on its own?

The manufacturer says it can be worn alone instead of a disposable swim nappy, or underneath a separate Happy Nappy.

Does it adjust as a baby grows?

The poppers can be repositioned to change the waist and nappy length. The listing gives differing fit-period wording, so treat the stated period as an estimate and check fit as your child grows.

Is the Happy Nappy included?

The listing describes the Size Adjustable Nappy as designed to go under a Happy Nappy, but does not specify the Happy Nappy as included.

How should it be cared for?

The listing describes it as machine washable. It also advises checking and changing a swim nappy every 1-2 hours or after each swim.